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Red Planaria (Convolutriloba retrogemma) ARTICLE

Red Planaria (Convolutriloba retrogemma)

Rust-Brown Flatworms / Red Planaria are common nuisance flatworms that multiply fast in low-flow areas and can irritate corals or foul the tank during...

Reefapedia 1 min read
Lymphocystis (Lymphocystivirus) ARTICLE

Lymphocystis (Lymphocystivirus)

Lymphocystis is a stress-linked viral condition that causes cauliflower-like nodules on fins or skin and often looks scary but is usually not deadly and...

Reefapedia 1 min read
Hydroids ARTICLE

Hydroids

Hydroids are stinging colonial polyps that hitchhike into reef tanks and can spread across plugs, racks, and rockwork. They often irritate corals and cause...

Reefapedia 4 min read
Myrionema Hydroids ARTICLE

Myrionema Hydroids

Myrionema hydroids are stinging colonial polyps that often spread around zoa mats and frag plugs, causing localized zoanthid irritation and persistent closure. They thrive...

Reefapedia 4 min read
Christmas-Tree Hydroid ARTICLE

Christmas-Tree Hydroid

Fire/Christmas-tree hydroids are stinging Pennaria colonies that look like tiny feathery “mini trees” on plugs, racks, and sump/overflow surfaces. They can irritate corals—and sting...

Reefapedia 4 min read
Zoanthid-Eating Nudibranch ARTICLE

Zoanthid-Eating Nudibranch

Zoanthid-eating nudibranchs are tiny, camouflaged predators that eat zoa polyps and can wipe colonies fast. They hide in mats and lay eggs, so outbreaks...

Reefapedia 4 min read
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